SIN for International Students: Get Yours Step by Step: CampusWage

The manager hands you the new-hire form, and one box says "SIN". You have an offer, a study permit and a start date, but no idea what goes in that box. A SIN for international students is a free nine-digit number from the Government of Canada, and you need it so an employer can pay you and report your earnings properly. You apply for it yourself, and you can do it before your first shift.

Check the official page first. Application options, required documents and wait times change. The source that counts is Service Canada's page on the Social Insurance Number at canada.ca, not this post.

What a SIN is, and why employers ask for it

SIN stands for Social Insurance Number. Employers use it to report what they pay you to the Canada Revenue Agency (CRA), and it is how your payroll deductions are matched to you. Those deductions include CPP (Canada Pension Plan), EI (Employment Insurance) and income tax. If you want to see what each one does to a pay cheque, what comes off your paycheque in Ontario walks through it.

It is also the number that connects you to your tax return later, so the right one, entered correctly, saves you trouble in the spring.

Who can get a SIN on a study permit

In general, you need a valid study permit that allows you to work in Canada. Not every permit does, so read the conditions printed on yours. If you are not sure whether you are allowed to work, ask IRCC (Immigration, Refugees and Citizenship Canada) before you apply, because the SIN does not give you permission to work. The permit does.

If you are still working out how many hours you may work, how to keep track of your study permit hours explains the weekly idea, and the current limit is on IRCC's website.

How to apply: a step-by-step checklist

Read your study permit. Check that it allows work and note the expiry date. You will need both soon.
Find the current document list. Service Canada lists what to bring. It generally includes your study permit and a passport or other identity document, but confirm the exact list on the official page.
Choose how to apply. Service Canada offers more than one way, such as in person, online or by mail. Which ones you can use depends on your situation, so check what is offered to you.
Apply and keep your confirmation. Keep any receipt or reference number until your SIN arrives.
Memorise it, then store the paper safely. Do not carry the card or letter in your wallet.

There is no fee to get a SIN. If a website or a person asks you to pay for one, that is a warning sign. Go back to the official page.

What a SIN starting with 9 means

If you are on a temporary permit, your SIN will generally start with the digit 9. That signals a temporary status, and the number is tied to how long your permit lasts. If you extend your permit, you will generally need to update your SIN record with Service Canada. If you later become a permanent resident, you will generally need a new number that does not start with 9. Check Service Canada for the exact steps at the time.

When to give your SIN to your employer

Employers are required to ask for your SIN when you start a job, and the common guidance from Service Canada is to give it to them within three days of starting. Tell the employer plainly if you have applied and are still waiting. A reasonable employer would rather hear that than wonder. Do not skip it, though: your pay and tax records depend on it.

Example: Imagine Chen, who arrives in September and gets a job offer on a Tuesday. He reads his study permit that evening, finds the official page, and applies on Wednesday. On his first Monday he tells his manager, "I have applied and I will bring the number as soon as it arrives." This is a made-up example, but the order is the useful part: apply as soon as you have the offer, then say so.

Keep your SIN safe

Give it only to people who need it. Employers, banks (for interest earned) and government offices are normal. A landlord, a gym or an online shop usually is not.
Never send it by text, social media or an unsecured email. Hand it over in person or through your employer's secure form.
Be suspicious of urgent calls. The government does not phone to threaten you about your SIN. If someone does, hang up and check on the official website.
Check your pay stub. Make sure your name is spelled right, because mistakes can complicate your tax slips. The pay stub checklist shows what else to look at.

Questions people ask

Do I need a SIN before I can get a job offer?

Generally no. You can accept an offer and then apply, but you will need the number to be paid properly, so do not wait.

Do I need a SIN to open a bank account?

Usually not. Many banks open accounts for students without one, though a bank may ask for it later if your account earns interest. Ask the bank what it needs.

Is a SIN the same as a work permit?

No. Your study permit decides whether you may work. The SIN is only the number used to report your pay.

What if I lose my SIN card or letter?

Contact Service Canada. Keep the number somewhere private, since you will need it again at tax time.

Does my SIN change if I extend my permit?

The number may stay the same, but a temporary SIN has an expiry tied to your permit. Update your details with Service Canada when your permit is renewed.

Keeping track once you are working

Once the SIN is sorted, the next job is knowing what your shifts pay and how many hours you worked. CampusWage, a free shift and wage tracker for students, puts your shifts and classes in one week, shows what each shift pays after unpaid breaks and optional deductions, and keeps your off-campus hours against a weekly limit so a busy week does not catch you out. It is a tool for tracking, not a substitute for the official rules.

This is general information, not tax, legal or immigration advice. Rules, forms and wait times change, so confirm everything with Service Canada, IRCC and the Canada Revenue Agency.